How to compile and copy the frontend build to the resources folder in a spring boot project

frontend.gradle

// include in `build.gradle`
// using `apply from: 'frontend.gradle'`

node {
    nodeProjectDir = file("./frontend-app")
}

task buildFrontendApp(type: NpmTask) {
    args = ['run', 'build']
}

task copyFrontendApp(type: Copy) {
    dependsOn('buildFrontendApp')
    from('./frontend-app/build')
    into("./src/main/resources/static")
}

buildFrontendApp.dependsOn npmInstall
processResources.dependsOn copyFrontendApp
copyFrontendApp.dependsOn buildFrontendApp
build.dependsOn copyFrontendApp

Also add the node-gradle plugin to the build.gradle file using

plugins {
   // ...
  id 'com.github.node-gradle.node' version '3.2.1'
}